SSD中，SATA、m2、PCIE和NVME各有什么意义呢？

翻译 What’s the difference between SATA, PCIe and NVMe?

NVMe, AHCI and IDE are transfer protocols (languages). They run on top of transfer interfaces such as PCIe or SATA (spoken, written).

NVMe，AHCI和IDE是传输协议（语言）。 它们运行在诸如PCIe或SATA（口头，书写）之类的传输接口之上。

SATA is the market incumbent and dominant interface for connecting an SSD to the PC.

It employs the command protocol AHCI (it also supports IDE) which was built with slower spinning disks in mind rather than flash memory. SATA transfer rates begin at 150 MB/s and max out at 600 MB/s for third generation technology. For most consumer uses of SSDs this is absolutely adequate.

现在市面上 SSD接入PC 的主要接口 是 SATA。

其采用命令协议AHCI（它还支持IDE）是为寻道旋转磁盘设计的, 而不是闪存。

SATA三代 传输速率 每秒在150 MB ~ 600 MB 之间。

对于SSD的大多数消费者来说，这绝对是足够的。

PCIe (PCI Express) supersedes SATA as the latest high bandwidth interface. Entry level PCIe SSD speeds are two to three times faster than the older generation of SATA 3.0 SSDs mainly due to the number of channels contained by each to transfer data (roughly 10 for SATA and 25 for PCIe). However, depending on usage, real world benchmarks may not reflect this massive gain due to bottlenecks elsewhere in the PC. We leave it to your interpretation of thousand of real world benchmarks (e.g. OCZ RevoDrive 350 PCIe vs Samsung 850 Pro SATA 3.0) to assess whether the premium is justified for PCIe NVMe versus SATA SSDs

PCIe（PCI Express）取代SATA 作为最新的高带宽接口。

入门级PCIe SSD速度比旧版SATA 3.0 SSD的速度快了二至三倍，这主要是由于每个SSD传输数据所包含的频道数量（大约10个用于SATA，25个用于PCIe）。 然而，根据使用情况，实际应用中体验不会有那么大的提升, 因为PC的瓶颈不在硬盘这里了。

您查看数千个真实世界的基准测试（例如OCZ RevoDrive 350 PCIe和Samsung 850 Pro SATA 3.0），以评估多花钱购买PCIe NVMe 是否划算.

NVMe is the latest high performance and optimized protocol which supersedes AHCI and compliments PCIe technology.

It offers an optimised command and completion path for use with NVMe based storage. It was developed by a consortium of manufacturers specifically for SSDs to overcome the speed bottleneck imposed by the older SATA connection.

It is akin to a more efficient language between storage device and PC: one message needs to be sent for a 4GB transfer instead of two, NVMe can handle 65,000 queues of data each with 65,000 commands, instead of one queue that with the capacity for 32 commands, and it only has seven major commands (read, write, flush etc). NVMe delivers better performance and reduced latency and is a scalable, but at a price! Take a look at Samsung’s offering of this technology in the 950 Pro to see how performance and price compares.

This particular drive relies upon a new M.2 internal mount on the PC motherboard, as presumably will other future NVMe based SSDs. NVMe will also be the protocol of choice for the next generation of storage technologies such as 3D XPoint.

NVMe是最新的高性能和优化协议，取代了AHCI，并支持PCIe技术。

对于基于NVMe的存储, 它提供了一个优化的命令和完成路径。

该协议由 固态硬盘制造商 联合开发，以克服旧SATA引入的速度瓶颈。

它像是 存储设备 和 PC 之间的更有效的语言：

4GB传输需要发送 一个消息, 而不是两个，NVMe可以处理65,000个数据队列，每个具有65,000个命令，而不是一个容量为32的队列命令，它只有七个主要命令（读，写，冲洗等）。 NVMe 性能好和延迟低，且可扩展，但价格贵啊!

看看三星在950 Pro中提供的这项技术，评估权衡 性能和价格。

这个驱动器 依赖于PC主板上的M.2插口，M.2 估计未来将会是其他未来的基于 NVMe的SSD的插口.

NVMe也将成为下一代存储技术（如3D XPoint）的首选协议.